Kastamonu weather in December

In December, Kastamonu sees average daytime highs of 5°C and overnight lows near -2°C, with 59 mm of precipitation across 10.6 wet days and about 9.1 hours of daylight. It is the 10th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 7°C in the first days to 4°C by the end. The sky is clear or mostly clear about 25% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 12 min at the start of December to 9 hours by month's end. Set against the rest of the year, December is Kastamonu's 10th-clearest and 9th-windiest month. For the whole year in context, see Kastamonu's year-round climate.

Daytime high
10th warmest
Overnight low
-2°
3rd coldest
Precipitation
59 mm
10.6 wet days
Daylight
9 hours
7:10 AM – 4:12 PM
Cloud cover
66%
10th clearest
Wind
6 km/h
9th windiest
Solar energy
1.61 kWh/m²
Travel score
0.2
out of 10

Kastamonu is central district and city in Kastamonu Province, Turkey.

Air quality
High
PM2.5 29.2 µg/m³ · 2019
Density
85/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 7°C in the first days to 4°C by the end.

A typical December day in Kastamonu reaches about 5°C in the afternoon and slips back to -2°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between -1°C and 11°C. Set against its neighbours, December runs about 6°C cooler than November and about 2°C warmer than January.

-10°-5°10°15°151015202531
Avg high (°C)Avg low (°C)
18-1
27-1
37-1
47-1
57-1
66-1
76-2
86-2
96-2
106-2
116-2
125-2
135-2
145-2
155-2
165-2
175-3
185-3
195-3
204-3
214-3
224-3
234-3
244-3
254-3
264-3
274-3
284-3
294-3
304-3
314-3

How December really feels in Kastamonu

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 31 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
31
wind chill below the day's low

The story in December is cold — wind chill drags the overnight "feels like" below the raw low.

Kastamonu weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°51119.49.40.0
Feb / -3°5210.98.810.30.2
Mar / -1°6512.27.411.71.7
Apr14° / 6413.22.413.13.9
May19° / 7213.60.114.35.7
Jun23° / 11°5811.8014.96.8
Jul26° / 13°306014.77.8
Aug27° / 14°245.7013.77.8
Sep23° / 10°336.9012.37.6
Oct18° / 518.60.610.95.9
Nov11° / 447.93.49.72.8
Dec / -2°5910.67.79.10.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 64%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24258
34159
44060
53961
63961
73862
83862
93862
103763
113664
123664
133664
143664
153565
163565
173565
183565
193565
203565
213565
223565
233565
243466
253466
263466
273367
283268
293268
303268
313169

Chance of precipitation in December

Any precipitationSnow

Kastamonu gets around 59 mm of rain and snow over 10.6 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 35% and peaks near 37% on the wettest days, and about 8 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13118
23218
33219
43319
53320
63421
73422
83422
93523
103524
113524
123625
133625
143626
153626
163627
173627
183527
193527
203527
213527
223527
233527
243527
253527
263528
273528
283629
293630
303730
313731

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 6 km/h in December.

Across December, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 12 min at the start of December to 9 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 6:58 AM to 7:17 AM, and sunset from 4:12 PM to 4:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.26:584:12
29.26:594:11
39.27:004:11
49.27:014:11
59.27:024:11
69.17:024:11
79.17:034:11
89.17:044:11
99.17:054:11
109.17:064:11
119.17:074:11
129.17:074:11
139.07:084:11
149.07:094:11
159.07:104:12
169.07:104:12
179.07:114:12
189.07:124:12
199.07:124:13
209.07:134:13
219.07:134:14
229.07:144:14
239.07:144:15
249.07:154:15
259.07:154:16
269.07:154:16
279.07:164:17
289.07:164:17
299.07:164:18
309.07:164:19
319.07:174:20

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.61 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.61 kWh/m² to a high of 6.68 kWh/m² in July across the year — December's 1.61 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.8Dim
21.8Dim
31.7Dim
41.7Dim
51.7Dim
61.7Dim
71.7Dim
81.6Dim
91.6Dim
101.6Dim
111.6Dim
121.6Dim
131.6Dim
141.6Dim
151.6Dim
161.6Dim
171.6Dim
181.6Dim
191.6Dim
201.6Dim
211.6Dim
221.6Dim
231.6Dim
241.6Dim
251.6Dim
261.6Dim
271.6Dim
281.6Dim
291.6Dim
301.6Dim
311.6Dim
Planning a trip in December

Is December a good time to visit Kastamonu?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

0.2
Sightseeing
10th-best month of the year
0.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Kastamonu.

What to pack for Kastamonu in December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Kastamonu sees daytime highs around 5°C and nights near -2°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 11 days see rain.

a warm layera heavy coatrain gear

UV index in Kastamonu in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kastamonu peaks around August 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highModerateLowAug 10UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar3Moderate
Apr7High
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep7Very high
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Kastamonu in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Kastamonu is worst in April — around 41 µg/m³ PM2.5 (poor), about 1.9× the cleanest month (December, 21 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Kastamonu's WHO annual average of 29.2 µg/m³.

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateApr 1941 µg/m³Dec 2122 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb26Moderate
Mar40Poor
Apr41Poor
May40Poor
Jun32Moderate
Jul25Moderate
Aug25Moderate
Sep25Moderate
Oct27Moderate
Nov25Moderate
Dec21Moderate
Location & terrain

Where is Kastamonu?

Kastamonu sits at 41.4°N, 33.8°E, 786 m above sea level, in Turkey. The nearest listed city is Taşköprü, 39 km away.

SafranboluİskilipOsmancıkÇerkeş

Topography around Kastamonu

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Kastamonu.

Within 3 km, the terrain around Kastamonu has significant variations in elevation — a maximum elevation change of 317 m around an average of 884 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 791 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,562 m.

The land around Kastamonu is covered by trees (49%) and artificial surfaces (22%) within 3 km, trees (45%), cropland (32%) and grassland (20%) within 16 km, and trees (64%) and grassland (23%) within 80 km.

3 km
317 m
16 km
791 m
80 km
2,562 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Taşköprü 39 km · Tosya 46 km · Boyabat 83 km · Çankırı 88 km · Safranbolu 91 km · İskilip 92 km · Osmancık 97 km · Çerkeş 97 km

Turkey travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 41% of US
price level, 2025
GDP per capita
$18,599
2025
Happiness
5.3 / 10
World Happiness, 2025
Homicide rate
3.2
per 100k, 2023
Road deaths
6.7
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 488
Religion
Muslim 100%other 0%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Kastamonu (41.3781°, 33.7753°, elevation 786 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).